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- W2034873668 abstract "Low density lipoproteins (LDL) are thought to play a major role in cardiovascular diseases such as atherosclerosis. Much remains to be done to understand the cellular effects of LDL and how the extracellular matrix (ECM) influences these effects. We found that LDL produced a dose dependent increase in vascular smooth muscle cell (SMC) proliferation. The ECM altered the proliferative response of SMC to LDL: on collagen I there was a 66% inhibition, endothelial cell derived-ECM a 2-fold increase, and collagen IV no difference in proliferation compared to paired controls. LDL affected SMC motility (cell area and shape factor) but the extent and direction of the effect depended on whether the cells were cultured on uncoated or coated dishes. LDL treated cultures had a 5-fold lower migration rate but net movement was not different, suggesting that LDL decreased SMC random movement. There was a dose-dependent accumulation of lipid by SMC incubated with LDL and, subsequently, cytoplasmic lipid droplets were observed. Cells cultured on uncoated plates showed an increased cholesterol content as a function of LDL concentration. In contrast, cells cultured on a collagen IV matrix showed no net change in cholesterol content over the range of LDL concentrations studied. Hence, the uptake of LDL cholesterol appears to be completely inhibited by this matrix. These studies indicate that the influence of LDL on several SMC parameters is modulated by ECM components." @default.
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- W2034873668 date "1992-05-01" @default.
- W2034873668 modified "2023-09-26" @default.
- W2034873668 title "Influence of low density lipoproteins on vascular smooth muscle cell growth and motility: Modulation by extracellular matrix" @default.
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- W2034873668 doi "https://doi.org/10.1016/s0309-1651(06)80063-9" @default.
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